Future of Flight Aviation Center & Boeing Tour, 8415 Paine Field Blvd., Mukilteo (I-5 Exit 189, WA Hwy 526 west 4 miles (6.4km), past the huge Boeing building on your right, then at the 4-way stoplight turn Left onto Paine Field Blvd and follow signs for the museum), ☎ +1-425-438-8100, +1-888-467-4777 (email@example.com, fax: +1-425-265-9808), . 08:30-17:30h daily, except for a few holidays). Boeing's Everett factory is the world's largest building by interior volume. It is where the Boeing 747, 767, 777, and 787 airliners are made, making it a must see for the aviation nut, and tolerable for the rest of the family. Tours start from the Future of Flight Aviation Center, which has a 28,000 square foot (2600 square metres) gallery and theatre presentations which are fairly interesting in their own right. The tours leave several times a day but have limited capacity, so reservations are recommended. No cameras allowed on the tour, not even your cell phone! The factory adjoins Paine Field, Snohomish County's airport, from which the completed aircraft fly off to being service.$15 for museum and tour ($8 for 15 years and under); $9 for museum only.